. Author manuscript; available in PMC: 2015 Sep 1.

Published in final edited form as: Am J Obstet Gynecol. 2014 Mar 5;211(3):253.e1–253.e8. doi: 10.1016/j.ajog.2014.02.033

Table 4.

First trimester ultrasound variables as predictors of SGA5

	Not SGA (N=550)	SGA (N=28)	P-value^a	Unadjusted AUC (95%CI)	Adjusted AUC^b (95%CI)	P-value^c
PV, cc	69.3 (22)	52.6 (16)	<0.001	0.725 (0.636–0.814)	0.793 (0.723–0.862)	0.02
PQ	0.78 (0.2)	0.6 (0.2)	<0.001	0.733 (0.646–0.820)	0.797 (0.728–0.866)	0.02
MPD, cm	11.4 (1.6)	10.2 (1.7)	0.001	0.688 (0.589–0.784)	0.784 (0.716–0.852)	0.04
PMI	15.3 (3.0)	17.9 (3.6)	<0.001	0.724 (0.635–0.814)	0.776 (0.698–0.853)	0.03
MCD, cm	8.3 (1.0)	7.4 (0.8)	<0.001	0.734 (0.652–0.816)	0.804 (0.734–0.874)	0.003
Mean PI	1.46 (0.5)	1.62 (0.6)	0.14	0.598 (0.487–0.708)	0.717 (0.628–0.807)	0.28

SGA5- birthweight <5th%ile; AUC- area under the curve; PV- placental volume; PQ- placental quotient; MPD- mean placental diameter; PMI- placental morphology index (MPD/PQ); MCD- mean chorionic diameter; PI- pulsatility index (uterine artery Doppler)

T-test;

Adjusted for race and tobacco;

P-value comparing the AUC for clinical model (0.686) to the adjusted model using clinical factors plus the ultrasound variable